The CLUSTERNODE option was previously
required when using TSM in a PowerHA (HACMP) environment. But not anymore:

Question

Do tsm client 6.1 and 6.2 support PowerHA cluster system?

Answer

TSM client supports all versions of PowerHA. In the past,
TSM client used to publish information in the client books about the HACMP
versions that it supported. The reason for this was, at
that time TSM client was invoking the HACMP API in order to support it. From TSM version 6.1, TSM client does not use the HACMP
API. As long as TSM client is configured with HACMP as documented in the
client books and the HACMP documentation, TSM will be able to support any
version of PowerHA (formerly known as HACMP).